notification: expand/collapse animation adjustment

quickshell/Common/Theme.qml

@@ -799,12 +799,12 @@ Singleton {
 
     readonly property int notificationExpandDuration: {
         const base = notificationAnimationBaseDuration;
-        return base === 0 ? 0 : Math.round(base * 1.4);
+        return base === 0 ? 0 : Math.round(base * 1.0);
     }
 
     readonly property int notificationCollapseDuration: {
         const base = notificationAnimationBaseDuration;
-        return base === 0 ? 0 : Math.round(base * 1.1);
+        return base === 0 ? 0 : Math.round(base * 0.85);
     }
 
     readonly property int popoutAnimationDuration: {

quickshell/Modules/Notifications/Center/KeyboardNavigatedNotificationList.qml

@@ -11,16 +11,38 @@ DankListView {
     property bool autoScrollDisabled: false
     property bool isAnimatingExpansion: false
     property alias listContentHeight: listView.contentHeight
+    property real stableContentHeight: 0
     property bool cardAnimateExpansion: true
     property bool listInitialized: false
 
     Component.onCompleted: {
         Qt.callLater(() => {
-            if (listView)
+            if (listView) {
                 listView.listInitialized = true;
+                listView.stableContentHeight = listView.contentHeight;
+            }
         });
     }
 
+    onContentHeightChanged: {
+        if (!isAnimatingExpansion)
+            stableContentHeight = contentHeight;
+    }
+
+    onIsAnimatingExpansionChanged: {
+        if (isAnimatingExpansion) {
+            let delta = 0;
+            for (let i = 0; i < count; i++) {
+                const item = itemAtIndex(i);
+                if (item && item.children[0] && item.children[0].isAnimating)
+                    delta += item.children[0].targetHeight - item.height;
+            }
+            stableContentHeight = contentHeight + delta;
+        } else {
+            stableContentHeight = contentHeight;
+        }
+    }
+
     clip: true
     model: NotificationService.groupedNotifications
     spacing: Theme.spacingL

quickshell/Modules/Notifications/Center/NotificationCard.qml

@@ -735,7 +735,7 @@ Rectangle {
         NumberAnimation {
             duration: root.expanded ? Theme.notificationExpandDuration : Theme.notificationCollapseDuration
             easing.type: Easing.BezierSpline
-            easing.bezierCurve: root.expanded ? Theme.expressiveCurves.emphasizedDecel : Theme.expressiveCurves.emphasizedAccel
+            easing.bezierCurve: Theme.expressiveCurves.emphasized
             onRunningChanged: {
                 if (running) {
                     root.isAnimating = true;

quickshell/Modules/Notifications/Center/NotificationCenterPopout.qml

@@ -113,7 +113,7 @@ DankPopout {
                 baseHeight += Theme.spacingM * 2;
 
                 const settingsHeight = notificationSettings.expanded ? notificationSettings.contentHeight : 0;
-                let listHeight = notificationHeader.currentTab === 0 ? notificationList.listContentHeight : Math.max(200, NotificationService.historyList.length * 80);
+                let listHeight = notificationHeader.currentTab === 0 ? notificationList.stableContentHeight : Math.max(200, NotificationService.historyList.length * 80);
                 if (notificationHeader.currentTab === 0 && NotificationService.groupedNotifications.length === 0) {
                     listHeight = 200;
                 }